Q. What is a Call Number and how do I find it?


While most public libraries use the Dewey Decimal System, academic libraries like McDermott use the Library of Congress Classification System. A Library of Congress Call Number is a unique alphanumeric set given to a book, which denotes its subject classification and publication details, and determines its location in the library.

In cases where a Call Number is not assigned, e.g. DVD media, McDermott Library will assign another unique number in its place, like DVD1234.


To find a Call Number in the library catalog (Discover), conduct a search for the item and then note the 1) Location and 2) Call Number in the item's details before retrieval.

Note: Materials located in the "Main Stacks" are sorted by Call Numbers beginning with A-G on the 3rd floor and H-Z on the 4th floor.

  • Last Updated Aug 10, 2017
  • Views 31
  • Answered By Matt Young

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